Simple French Toast in a Cup
Melt butter in the bottom of a large microwave-safe mug in the microwave, about 30 seconds. Tilt mug to coat all sides with melted butter.Advertisement
Stir melted butter, milk, egg, cinnamon, sugar, and vanilla extract together in the mug. Press bread cubes into milk mixture.
Microwave on High until set, about 90 seconds.